Positioning device and control method thereof
AssigneeImasen Electric Industrial Co., Ltd.
InventorsKentaro Nagatani, Koichi Yamanoue
Life of this patent
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Abstract
A positioning device contains an actuator composed of a DC motor, a deceleration mechanism, and a single-phase rotation sensor for detecting the amount of rotational displacement of the deceleration mechanism, and an electronic control unit that electrically drives the DC motor. The electronic control unit learns the time required for the motor to stop after turning off the power, and decelerates and controls the DC motor to stop at a target rotation stop position, which is approximately midway between the rising edge and the falling edge of the output pulse of the rotation sensor.
Claims13
A positioning device, comprising:
- an actuator connected to a moving body and composed of a DC motor, a speed reduction mechanism, and a single-phase rotation sensor for detecting an amount of rotational displacement of the speed reduction mechanism;
- and
- the electronic control device for electrically driving the DC motor;
- wherein
- the electronic control device comprises stop control means for performing deceleration control so as to stop the DC motor, with a target rotation stop position set substantially midway between the rising edge and the falling edge of the output pulse of the rotation sensor;
- and
- learning control means for learning the target rotation stop position.
Dependencies are inferred from the claim text.